JP6865402B2

JP6865402B2 - Cleaning method and cleaning equipment

Info

Publication number: JP6865402B2
Application number: JP2017134528A
Authority: JP
Inventors: 青倉　勇; 勇青倉; 大助田端; 晃磯見
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2017-07-10
Filing date: 2017-07-10
Publication date: 2021-04-28
Anticipated expiration: 2037-07-10
Also published as: JP2019013897A

Description

本発明は、気体によって液体を微粒化する二流体ノズルを使用する洗浄方法及び洗浄装置に関するものである。 The present invention relates to a cleaning method and a cleaning device using a two-fluid nozzle that atomizes a liquid with a gas.

高圧洗浄装置は、車、又は外壁などの洗浄用に広く用いられている。高圧洗浄装置の例としては、例えば、特許文献１に記載された高圧洗浄装置がある。図６Ａ及び図６Ｂに示すように、高圧洗浄機８０は、洗浄機本体８１と吐出装置９１とを備えて構成されている。洗浄機本体８１には、吸水口８６と吐水口８７とが設けられている。吸水口８６は、不図示のホースを介して水道管又は貯水槽等に設けられた蛇口等と接続されることにより、洗浄機本体８１の内部に対して水を取り込む役割を担っている。一方、吐水口８７は、洗浄機本体８１の内部に設けられた加圧ユニット８８で加圧された高圧水を、洗浄機本体８１から吐出する箇所である。この吐水口８７は、不図示のホースを介して吐出装置９１と接続されることとなる。 High-pressure washers are widely used for cleaning cars, outer walls, and the like. As an example of the high pressure cleaning device, there is, for example, the high pressure cleaning device described in Patent Document 1. As shown in FIGS. 6A and 6B, the high pressure washer 80 includes a washer main body 81 and a discharge device 91. The washing machine main body 81 is provided with a water suction port 86 and a water discharge port 87. The water suction port 86 plays a role of taking in water into the inside of the washing machine main body 81 by being connected to a faucet or the like provided in a water pipe or a water storage tank via a hose (not shown). On the other hand, the water spout 87 is a position where the high-pressure water pressurized by the pressurizing unit 88 provided inside the washing machine main body 81 is discharged from the washing machine main body 81. The water discharge port 87 is connected to the discharge device 91 via a hose (not shown).

吐出装置９１は、ガン９２とノズル９３とを組み合わせて構成される部材である。ガン９２とノズル９３とは、分割された状態で洗浄機本体８１に収納できるようになっている。ガン９２とノズル９３とは、ガン９２の先端部とノズル９３の後端部とにそれぞれ形成された接続部を接続することで結合できるようになっている。 The discharge device 91 is a member formed by combining the gun 92 and the nozzle 93. The gun 92 and the nozzle 93 can be stored in the washing machine main body 81 in a separated state. The gun 92 and the nozzle 93 can be connected by connecting connection portions formed at the front end portion of the gun 92 and the rear end portion of the nozzle 93, respectively.

また、ガン９２には、不図示のホースを介して吐水口８７と接続するための導水口９２ａが形成されており、さらに、ガン９２の内部には、導水口９２ａからノズル９３へ高圧水を導く高圧水の導水経路内に不図示の開閉機構が備わっている。この開閉機構を開閉動作させることによって、ノズル９３の先端からの高圧水の吐出を制御できるようになっている。 Further, the gun 92 is formed with a water guide port 92a for connecting to the water discharge port 87 via a hose (not shown), and further, high pressure water is supplied from the water guide port 92a to the nozzle 93 inside the gun 92. An opening / closing mechanism (not shown) is provided in the guiding path of the high-pressure water to be guided. By opening and closing this opening / closing mechanism, it is possible to control the discharge of high-pressure water from the tip of the nozzle 93.

特許第６０４６３３３号公報Japanese Patent No. 6046333

しかしながら、特許文献１に記載された前記従来の高圧洗浄機の構成は、加圧ユニットにて約９ＭＰａ以上の高圧に加圧された水をノズルに供給するために、ノズル先端から吐出される洗浄水は高圧である。そのため、洗浄水が被洗浄体に衝突した際に周辺に跳ね返った洗浄水が飛散するという問題を有している。
本発明は、上記従来の問題を解決するものであり、気体と液体とを供給した二流体ノズルを洗浄に用いることにより、洗浄時に周辺への洗浄水の飛散を抑制しつつ洗浄可能な洗浄方法及び洗浄装置を提供することを目的とする。 However, the configuration of the conventional high-pressure washer described in Patent Document 1 is cleaning discharged from the tip of the nozzle in order to supply water pressurized to a high pressure of about 9 MPa or more by the pressurizing unit to the nozzle. Water is high pressure. Therefore, when the washing water collides with the object to be washed, there is a problem that the washing water bounced off to the periphery is scattered.
The present invention solves the above-mentioned conventional problem, and is a cleaning method capable of cleaning while suppressing scattering of cleaning water to the surroundings at the time of cleaning by using a two-fluid nozzle supplied with gas and liquid for cleaning. And to provide a cleaning device.

前記目的を達成するために、本発明の１つの態様にかかる洗浄方法は、
液体流路と気体流路とを有する噴霧装置本体部と、
前記噴霧装置本体部の先端に配置されて、前記液体流路の開口を覆いかつ平らな内側端面を有する内蓋部と、
前記噴霧装置本体部の先端に配置されて前記内蓋部を覆うとともに、前記気体流路の開口を覆いかつ前記内蓋部の前記内側端面に対向する平らな外側端面を持つ外側端部を有する外蓋部と、
前記内蓋部と前記外蓋部との間に配置され、前記内蓋部の前記内側端面と前記外蓋部の前記外側端面との間の円板状の外形の空間で構成され、前記気体流路を流れる気体流と前記液体流路を流れる液体流とを混合する気液混合部と、
前記内蓋部の前記内側端面の周方向の少なくとも１箇所に貫通して設けられて前記気液混合部と連通して、前記液体流路を流れる液体流を前記気液混合部に流入させる液体流入口と、
前記内蓋部と前記外蓋部との間の前記気液混合部の側部に前記気液混合部と連通して配置されて、前記液体流入口から前記気液混合部に流入する前記液体流に向かって、前記気体流路を流れる前記気体流を前記気液混合部に流入させる気体流入口と、
前記外蓋部の前記外側端面に貫通して設けられて前記気液混合部と連通し、前記気液混合部で前記気体流と前記液体流が混合して微粒化した液体を噴出する噴出口とを備える噴霧装置を使用して、前記気液混合部で前記気体流と前記液体流が混合して前記微粒化した液体を被洗浄体の表面に噴霧して前記被洗浄体の表面を洗浄する洗浄方法であって、
前記噴霧装置の前記噴霧装置本体部と前記被洗浄体の表面との距離を測長装置で測定し、前記被洗浄体の表面と前記噴霧装置との間の距離が、予め決められた洗浄距離以内にあるか否かを表示装置で表示し、
前記被洗浄体の表面と前記噴霧装置との間の前記距離が前記洗浄距離以内にあると前記表示装置で表示されたのち、前記噴霧装置から前記微粒化した液体を前記被洗浄体の表面に噴霧して前記被洗浄体の表面を洗浄する。
In order to achieve the above object, the cleaning method according to one aspect of the present invention is:
A spraying device main body having a liquid flow path and a gas flow path,
An inner lid portion that is arranged at the tip of the main body of the spray device, covers the opening of the liquid flow path, and has a flat inner end surface.
It is arranged at the tip of the main body of the spray device and has an outer end portion that covers the inner lid portion and has a flat outer end surface that covers the opening of the gas flow path and faces the inner end surface of the inner lid portion. With the outer lid
The gas is arranged between the inner lid portion and the outer lid portion, and is composed of a disk-shaped outer space between the inner end surface of the inner lid portion and the outer end surface of the outer lid portion. A gas-liquid mixing section that mixes the gas flow flowing through the flow path and the liquid flow flowing through the liquid flow path.
A liquid that is provided so as to penetrate at least one position in the circumferential direction of the inner lid portion of the inner lid portion and communicates with the gas-liquid mixing portion to allow a liquid flow flowing through the liquid flow path to flow into the gas-liquid mixing portion. The inlet and
The liquid that is arranged in communication with the gas-liquid mixing portion on the side portion of the gas-liquid mixing portion between the inner lid portion and the outer lid portion and flows into the gas-liquid mixing portion from the liquid inflow port. A gas inlet that allows the gas flow flowing through the gas flow path to flow into the gas-liquid mixing section toward the flow, and a gas inlet.
An outlet that is provided so as to penetrate the outer end surface of the outer lid portion and communicates with the gas-liquid mixing portion, and ejects the atomized liquid by mixing the gas flow and the liquid flow at the gas-liquid mixing portion. The surface of the body to be cleaned is cleaned by spraying the atomized liquid on the surface of the body to be cleaned by mixing the gas flow and the liquid flow in the gas-liquid mixing section using a spray device equipped with the above. It is a cleaning method to do
The distance between the spraying device main body of the spraying device and the surface of the object to be cleaned is measured by a length measuring device, and the distance between the surface of the spraying device and the spraying device is a predetermined cleaning distance. The display device indicates whether or not it is within the range,
After the display device indicates that the distance between the surface of the object to be cleaned and the spray device is within the cleaning distance, the atomized liquid from the spray device is applied to the surface of the object to be cleaned. The surface of the object to be cleaned is cleaned by spraying.

また、前記目的を達成するために、本発明の別の態様にかかる洗浄装置は、
液体流路と気体流路とを有する噴霧装置本体部と、
前記噴霧装置本体部の先端に配置されて、前記液体流路の開口を覆いかつ平らな内側端面を有する内蓋部と、
前記噴霧装置本体部の先端に配置されて前記内蓋部を覆うとともに、前記気体流路の開口を覆いかつ前記内蓋部の前記内側端面に対向する平らな外側端面を持つ外側端部を有する外蓋部と、
前記内蓋部と前記外蓋部との間に配置され、前記内蓋部の前記内側端面と前記外蓋部の前記外側端面との間の円板状の外形の空間で構成され、前記気体流路を流れる気体流と前記液体流路を流れる液体流とを混合する気液混合部と、
前記内蓋部の前記内側端面の周方向の少なくとも１箇所に貫通して設けられて前記気液混合部と連通して、前記液体流路を流れる液体流を前記気液混合部に流入させる液体流入口と、
前記内蓋部と前記外蓋部との間の前記気液混合部の側部に前記気液混合部と連通して配置されて、前記液体流入口から前記気液混合部に流入する前記液体流に向かって、前記気体流路を流れる前記気体流を前記気液混合部に流入させる気体流入口と、
前記外蓋部の前記外側端面に貫通して設けられて前記気液混合部と連通し、前記気液混合部で前記気体流と前記液体流が混合して微粒化した液体を噴出する噴出口とを備える噴霧装置を少なくとも二つ以上備え、
前記噴霧装置の前記噴霧装置本体部と前記被洗浄体の表面との距離を測定する測長装置と、前記被洗浄体の表面と前記噴霧装置との間の距離が、予め決められた洗浄距離以内にあるか否かを表示する表示装置とをさらに備えて、
前記被洗浄体の表面と前記噴霧装置との間の前記距離が前記洗浄距離以内にあると前記表示装置で表示されるとき、前記噴霧装置から前記微粒化した液体を前記被洗浄体の表面に噴霧して前記被洗浄体の表面を洗浄する。
Further, in order to achieve the above object, the cleaning device according to another aspect of the present invention may be used.
A spraying device main body having a liquid flow path and a gas flow path,
An inner lid portion that is arranged at the tip of the main body of the spray device, covers the opening of the liquid flow path, and has a flat inner end surface.
It is arranged at the tip of the main body of the spray device and has an outer end portion that covers the inner lid portion and has a flat outer end surface that covers the opening of the gas flow path and faces the inner end surface of the inner lid portion. With the outer lid
The gas is arranged between the inner lid portion and the outer lid portion, and is composed of a disk-shaped outer space between the inner end surface of the inner lid portion and the outer end surface of the outer lid portion. A gas-liquid mixing section that mixes the gas flow flowing through the flow path and the liquid flow flowing through the liquid flow path.
A liquid that is provided so as to penetrate at least one position in the circumferential direction of the inner lid portion of the inner lid portion and communicates with the gas-liquid mixing portion to allow a liquid flow flowing through the liquid flow path to flow into the gas-liquid mixing portion. The inlet and
The liquid that is arranged in communication with the gas-liquid mixing portion on the side portion of the gas-liquid mixing portion between the inner lid portion and the outer lid portion and flows into the gas-liquid mixing portion from the liquid inflow port. A gas inlet that allows the gas flow flowing through the gas flow path to flow into the gas-liquid mixing section toward the flow, and a gas inlet.
An ejection port that is provided so as to penetrate the outer end surface of the outer lid portion and communicates with the gas-liquid mixing portion, and the gas flow and the liquid flow are mixed at the gas-liquid mixing portion to eject a atomized liquid. At least two or more spraying devices equipped with
The distance between the length measuring device that measures the distance between the main body of the spraying device and the surface of the spraying device of the spraying device and the surface of the spraying device and the spraying device is a predetermined cleaning distance. further comprising a display device for displaying whether within,
When the display device indicates that the distance between the surface of the object to be cleaned and the spray device is within the cleaning distance, the atomized liquid from the spray device is applied to the surface of the object to be cleaned. The surface of the object to be cleaned is cleaned by spraying.

以上のように、本発明の前記態様にかかる洗浄装置及び洗浄方法によれば、気体と液体とを洗浄に用いることにより、気液混合部で液体と気体とが混合されて液体が微粒化し、微粒化した液体を噴出口から噴出することができる。この結果、気化が早くかつ濡れ等を感じない粒径の小さな液体を噴霧できて、洗浄時に周辺への洗浄水の飛散を抑制しつつ洗浄可能である。 As described above, according to the cleaning apparatus and cleaning method according to the above aspect of the present invention, by using the gas and the liquid for cleaning, the liquid and the gas are mixed in the gas-liquid mixing section and the liquid is atomized. The atomized liquid can be ejected from the spout. As a result, it is possible to spray a liquid having a small particle size that vaporizes quickly and does not feel wet, and it is possible to perform cleaning while suppressing scattering of cleaning water to the surroundings during cleaning.

本発明の実施の形態１における洗浄装置が有する噴霧装置の噴霧装置本体部近傍の断面図Cross-sectional view of the vicinity of the spray device main body of the spray device included in the cleaning device according to the first embodiment of the present invention. 図１Ａの１Ｂ−１Ｂ線での断面図FIG. 1A is a cross-sectional view taken along the line 1B-1B. 本発明の実施の形態１における噴霧装置全体の概略構成図Schematic configuration of the entire spraying device according to the first embodiment of the present invention. 本発明の実施の形態１における洗浄装置全体の概略構成図Schematic configuration of the entire cleaning apparatus according to the first embodiment of the present invention. 本発明の実施の形態２における噴霧装置本体部を複数配置したときの概略断面図Schematic cross-sectional view when a plurality of spraying device main bodies according to the second embodiment of the present invention are arranged. 図３Ａの概略平面図Schematic plan view of FIG. 3A 図３Ｂの変形例を示す概略平面図Schematic plan view showing a modified example of FIG. 3B 図３Ｂの別の変形例を示す概略平面図Schematic plan view showing another modification of FIG. 3B 本発明の実施の形態３における洗浄装置と被洗浄体を示す概略図Schematic diagram showing the cleaning apparatus and the body to be cleaned according to the third embodiment of the present invention. 本発明の実施の形態３における洗浄装置の応用例を示す概略図Schematic diagram showing an application example of the cleaning apparatus according to the third embodiment of the present invention. 従来の高圧洗浄機を示す概略図Schematic diagram showing a conventional high pressure washer 従来の高圧洗浄機の断面を示す概略図Schematic diagram showing a cross section of a conventional high pressure washer

以下、本発明の実施の形態について、図面を参照しながら説明する。
（実施の形態１）
図１Ａは、本発明の実施の形態１における洗浄装置７１が有する噴霧装置１０の噴霧装置本体部１０ａ近傍の切断断面図である。図１Ｂは、図１Ａの１Ｂ−１Ｂ線での断面図である。以下に、この噴霧装置１０の構成について図１Ａを参照しながら説明する。
洗浄装置７１は、少なくとも１個の噴霧装置１０を備えている。
噴霧装置１０は、噴霧装置本体部１０ａと、内蓋部１３と、外蓋部１４とを少なくとも備えている。内蓋部１３と外蓋部１４とで気液混合部１５を構成している。噴霧装置１０は、さらに、噴霧装置蓋固定部１７を備えている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
FIG. 1A is a cut sectional view of the spraying device 10 included in the cleaning device 71 according to the first embodiment of the present invention in the vicinity of the spraying device main body 10a. FIG. 1B is a cross-sectional view taken along the line 1B-1B of FIG. 1A. Hereinafter, the configuration of the spraying device 10 will be described with reference to FIG. 1A.
The cleaning device 71 includes at least one spraying device 10.
The spraying device 10 includes at least a spraying device main body 10a, an inner lid 13, and an outer lid 14. The gas-liquid mixing portion 15 is composed of the inner lid portion 13 and the outer lid portion 14. The spraying device 10 further includes a spraying device lid fixing portion 17.

噴霧装置本体部１０ａは、円柱状部材の中心部に軸方向沿いに配置された液体流路１１と、液体流路１１の周囲に間隔をおいて軸方向沿いに配置された円筒状の気体流路１２とがそれぞれ形成されている。液体流路１１と気体流路１２とは、噴霧装置本体部１０ａの一部として中央部に位置する円筒部１０ｂで区切られている。
円筒部１０ｂの先端は、円筒部１０ｂ以外の噴霧装置本体部１０ａより先端側に少し突出し、その先端に内蓋部１３が固定されている。 The spraying device main body 10a has a liquid flow path 11 arranged along the axial direction in the center of the columnar member and a cylindrical gas flow arranged along the axial direction at intervals around the liquid flow path 11. Roads 12 and 12 are formed respectively. The liquid flow path 11 and the gas flow path 12 are separated by a cylindrical portion 10b located at the center as a part of the spray device main body portion 10a.
The tip of the cylindrical portion 10b slightly protrudes toward the tip side from the spraying device main body portion 10a other than the cylindrical portion 10b, and the inner lid portion 13 is fixed to the tip thereof.

内蓋部１３は、噴霧装置本体部１０ａの先端に配置され、液体流路１１の開口を覆いかつ平らな内側端面１３ａを有する断面略Ｃ字形状をなしている。内蓋部１３は、円筒部１０ｂの端面と内蓋部１３の内側端面１３ａの内面との間には、円板状の外形の第１隙間２２が形成されている。内蓋部１３の内側端面１３ａの外周部の１カ所には、内側端面１３ａを軸方向に貫通する液体流入口１８が形成されている。すなわち、液体流入口１８は、気液混合部１５の外周壁面近傍の上流側平坦面である内蓋部１３の内側端面１３ａに位置しており、液体流路１１と気液混合部１５とを連通させている。 The inner lid portion 13 is arranged at the tip of the spray device main body portion 10a, and has a substantially C-shaped cross section that covers the opening of the liquid flow path 11 and has a flat inner end surface 13a. The inner lid portion 13 has a disc-shaped first gap 22 formed between the end surface of the cylindrical portion 10b and the inner surface of the inner end surface 13a of the inner lid portion 13. A liquid inflow port 18 that axially penetrates the inner end surface 13a is formed at one location on the outer peripheral portion of the inner end surface 13a of the inner lid portion 13. That is, the liquid inflow port 18 is located on the inner end surface 13a of the inner lid portion 13, which is the upstream flat surface near the outer peripheral wall surface of the gas-liquid mixing portion 15, and connects the liquid flow path 11 and the gas-liquid mixing portion 15. It communicates.

外蓋部１４は、噴霧装置本体部１０ａの先端に配置され、内蓋部１３を覆うとともに、気体流路１２の開口を覆いかつ内蓋部１３の内側端面１３ａに対向する平らな外側端面１４ａを有する断面略Ω形状をなしている。外蓋部１４は、内蓋部１３との間の側部では、所定間隔の円筒状の外形の第２隙間２３をあけて覆うとともに、内蓋部１３との間の端部では、所定間隔の円板状の外形の空間の気液混合部１５を隙間として形成しつつ内蓋部１３を覆うように、噴霧装置本体部１０ａの端面と噴霧装置蓋固定部１７との間に挟持されて固定されている。なお、噴霧装置蓋固定部１７を無くして、外蓋部１４が、直接、噴霧装置本体部１０ａの端面に固定されるようにしてもよい。 The outer lid portion 14 is arranged at the tip of the spray device main body portion 10a, covers the inner lid portion 13, covers the opening of the gas flow path 12, and is a flat outer end surface 14a facing the inner end surface 13a of the inner lid portion 13. The cross section has a substantially Ω shape. The outer lid portion 14 covers the side portion between the outer lid portion 13 and the inner lid portion 13 with a second gap 23 having a cylindrical outer shape at a predetermined interval, and the outer lid portion 14 has a predetermined interval at the end portion between the outer lid portion 14 and the inner lid portion 13. It is sandwiched between the end face of the spray device main body 10a and the spray device lid fixing portion 17 so as to cover the inner lid portion 13 while forming the gas-liquid mixing portion 15 of the disk-shaped outer shape space as a gap. It is fixed. The spray device lid fixing portion 17 may be eliminated so that the outer lid portion 14 is directly fixed to the end surface of the spray device main body portion 10a.

外蓋部１４と内蓋部１３との間において所定間隔の円板状の外形の気液混合部１５を確実に形成するため、外蓋部１４の外側端面１４ａの内面に円環状の凸部２４を形成して、外蓋部１４の内面と内蓋部１３の内側端面１３ａとの間に強制的に隙間として気液混合部１５が配置形成できるようにしている。円環状の凸部２４は、外蓋部１４の外側端面１４ａの内面に設ける代わりに、内蓋部１３の内側端面１３ａの外面に設けても良い。このように構成される気液混合部１５は、気体流路１２を流れる気体流と液体流路１１を流れる液体流とを混合するためのものである。 In order to surely form a gas-liquid mixing portion 15 having a disk-shaped outer shape at a predetermined interval between the outer lid portion 14 and the inner lid portion 13, an annular convex portion is formed on the inner surface of the outer end surface 14a of the outer lid portion 14. 24 is formed so that the gas-liquid mixing portion 15 can be arranged and formed as a gap forcibly between the inner surface of the outer lid portion 14 and the inner end surface 13a of the inner lid portion 13. The annular convex portion 24 may be provided on the outer surface of the inner end surface 13a of the inner lid portion 13 instead of being provided on the inner surface of the outer end surface 14a of the outer lid portion 14. The gas-liquid mixing unit 15 configured in this way is for mixing the gas flow flowing through the gas flow path 12 and the liquid flow flowing through the liquid flow path 11.

また、気液混合部１５の側部において、円環状の凸部２４の一部を径方向に切り欠いて、気体流路１２と気液混合部１５とを連通させる気体流入口１９を形成している。よって、気体流入口１９は、液体流入口１８から流入する液体流の流入方向に対して、気体流入口１９から流入する気体流の流入方向が交差するように配置されている。気体流入口１９は、噴霧装置本体部１０ａの中心（中心軸２７）に対して液体流入口１８とは１８０度位相を異にした、液体流入口１８に対向する位置に位置する。さらに、外蓋部１４の外側端面１４ａの外面の中央には、円筒部が突出して固定され、軸方向に外側端面１４ａ及び円筒部を貫通した噴出口１６ａを有する噴出部１６を形成している。噴出口１６ａは、液体流路１１と同一中心軸２７上に配置されている。これに対して、液体流入口１８は、この中心軸２７から外れた位置に位置している。 Further, on the side portion of the gas-liquid mixing portion 15, a part of the annular convex portion 24 is cut out in the radial direction to form a gas inflow port 19 for communicating the gas flow path 12 and the gas-liquid mixing portion 15. ing. Therefore, the gas inflow port 19 is arranged so that the inflow direction of the gas flow flowing in from the gas inflow port 19 intersects with the inflow direction of the liquid flow flowing in from the liquid inflow port 18. The gas inlet 19 is located at a position facing the liquid inlet 18 which is 180 degrees out of phase with the liquid inlet 18 with respect to the center (central axis 27) of the spray device main body 10a. Further, at the center of the outer surface of the outer end surface 14a of the outer lid portion 14, a cylindrical portion is projected and fixed, and an ejection portion 16 having an outer end surface 14a and an ejection port 16a penetrating the cylindrical portion in the axial direction is formed. .. The spout 16a is arranged on the same central axis 27 as the liquid flow path 11. On the other hand, the liquid inflow port 18 is located at a position deviated from the central axis 27.

よって、気液混合部１５は、円環状の凸部２４と内蓋部１３と外蓋部１４とで囲まれて形成されており、軸方向沿いに内蓋部１３を貫通した液体流入口１８と、軸方向とは交差する方向沿いに円環状の凸部２４を切り欠いた気体流入口１９と、軸方向沿いに外蓋部１４を貫通した噴出口１６ａとに連通している。 Therefore, the gas-liquid mixing portion 15 is formed by being surrounded by the annular convex portion 24, the inner lid portion 13, and the outer lid portion 14, and the liquid inflow port 18 penetrating the inner lid portion 13 along the axial direction. The gas inflow port 19 having an annular convex portion 24 cut out along the direction intersecting the axial direction and the spout 16a penetrating the outer lid portion 14 along the axial direction are communicated with each other.

このような構成において、噴霧装置１０に供給された液体は、噴霧装置本体部１０ａに対して、図示しない液体供給口から装置先端側に液体流路１１を流れて液体流となり、その液体流は、第１隙間２２と液体流入口１８とを通って、気液混合部１５に供給される。また、噴霧装置１０に供給された気体は、噴霧装置本体部１０ａに対して、図示しない気体供給口から装置先端側に気体流路１２を流れて気体流となり、その気体流は、第２隙間２３と気体流入口１９とを通って、気液混合部１５に供給される。 In such a configuration, the liquid supplied to the spraying device 10 flows through the liquid flow path 11 from the liquid supply port (not shown) to the tip end side of the device with respect to the spraying device main body 10a, and the liquid flow becomes a liquid flow. , Is supplied to the gas-liquid mixing section 15 through the first gap 22 and the liquid inflow port 18. Further, the gas supplied to the spraying device 10 flows through the gas flow path 12 from the gas supply port (not shown) to the tip side of the device with respect to the spraying device main body 10a to become a gas flow, and the gas flow becomes a second gap. It is supplied to the gas-liquid mixing section 15 through the gas inlet 19 and the gas inlet 19.

気液混合部１５に対して気体流と液体流とが供給されると、気液混合部１５内で互いに混合され、液体が微粒化された後に、外蓋部１４に設けられた噴出部１６の噴出口１６ａから、混合されて微粒化された液体を外側に噴出する。 When the gas flow and the liquid flow are supplied to the gas-liquid mixing unit 15, they are mixed with each other in the gas-liquid mixing unit 15, and after the liquid is atomized, the ejection unit 16 provided on the outer lid portion 14 is provided. The mixed and atomized liquid is ejected to the outside from the ejection port 16a of the above.

以下、気液混合部１５での微粒化の機構について、図１Ｂを参照しながら説明する。液体流路１１を流れてきた液体流は、第１隙間２２を通り、内蓋部１３に設けられた液体流入口１８を通り、図１Ｂに示すように、気液混合部１５の円環状の凸部２４の近傍より、液体流が噴出部１６の方向へ供給される。 Hereinafter, the mechanism of atomization in the gas-liquid mixing unit 15 will be described with reference to FIG. 1B. The liquid flow flowing through the liquid flow path 11 passes through the first gap 22 and the liquid inflow port 18 provided in the inner lid portion 13, and as shown in FIG. 1B, is an annular shape of the gas-liquid mixing portion 15. A liquid flow is supplied in the direction of the ejection portion 16 from the vicinity of the convex portion 24.

一方、液体流入口１８から気液混合部１５に供給された液体流に対して、液体流入口１８の対向する位置に位置する気体流入口１９を通って気液混合部１５に供給された気体が、気液混合部１５内で液体に衝突する。このように衝突することで、液体は円環状の凸部２４に押し広げられ、薄い膜状になり円環状の凸部２４の周方向に流れることにより、薄い膜状からさらに細かな液滴へと変化する。さらに、この液滴を含む気液混合流を、気液混合部１５の円環状の凸部２４に沿って、周回及び撹拌することで、液滴をさらに微粒化することができ、より粒径の小さな液体を噴出口１６ａから噴霧することが可能である。 On the other hand, with respect to the liquid flow supplied from the liquid inlet 18 to the gas-liquid mixing section 15, the gas supplied to the gas-liquid mixing section 15 through the gas inlet 19 located at a position opposite to the liquid inlet 18. Collides with the liquid in the gas-liquid mixing section 15. By colliding in this way, the liquid is spread by the annular convex portion 24, becomes a thin film, and flows in the circumferential direction of the annular convex portion 24, thereby changing from the thin film to finer droplets. It changes with. Further, by circulating and stirring the gas-liquid mixed flow containing the droplets along the annular convex portion 24 of the gas-liquid mixing portion 15, the droplets can be further atomized, and the particle size can be further increased. It is possible to spray a small liquid of the above from the spout 16a.

より具体的には、気液混合部１５は直径８．０ｍｍ、高さ２．０ｍｍであり、噴出部１６の噴出口１６ａは直径１．５ｍｍ、長さ２．０ｍｍ、液体流入口１８は直径０．７ｍｍ、気体流入口１９は矩形であり、幅１．０ｍｍ、高さ１．０ｍｍの噴霧装置である。 More specifically, the gas-liquid mixing portion 15 has a diameter of 8.0 mm and a height of 2.0 mm, the ejection port 16a of the ejection portion 16 has a diameter of 1.5 mm and a length of 2.0 mm, and the liquid inlet 18 has a diameter. The 0.7 mm, gas inflow port 19 is a rectangular spray device having a width of 1.0 mm and a height of 1.0 mm.

この噴霧装置に対し、気体の例として圧縮空気を０．２ＭＰａ（ゲージ圧）の圧力で供給し、液体の例として水を０．１５ＭＰａ（ゲージ圧）の圧力で供給した。この条件で微粒化した水のザウター平均粒径をレーザー回折法にて評価を行った。レーザー回折法の測定距離は噴霧装置の先端から３００ｍｍの位置であり、ザウター平均粒径は１０μｍとなった。また、気体の例として圧縮空気を０．２ＭＰａ（ゲージ圧）の圧力で供給し、液体の例として、前記と同様に水を０．１５ＭＰａで供給した。この条件で微粒化した水のザウター平均粒径を、同様にレーザー回折法にて評価を行った。レーザー回折法の測定距離は噴霧装置の先端から３００ｍｍの位置であり、この条件で微粒化した水のザウター平均粒径は１０μｍとなった。 Compressed air was supplied to this sprayer at a pressure of 0.2 MPa (gauge pressure) as an example of gas, and water was supplied at a pressure of 0.15 MPa (gauge pressure) as an example of liquid. The Sauter mean diameter of the atomized water under these conditions was evaluated by laser diffraction. The measurement distance of the laser diffraction method was 300 mm from the tip of the spraying device, and the Sauter mean diameter was 10 μm. Further, as an example of a gas, compressed air was supplied at a pressure of 0.2 MPa (gauge pressure), and as an example of a liquid, water was supplied at 0.15 MPa in the same manner as described above. The Sauter mean diameter of water atomized under these conditions was similarly evaluated by laser diffraction. The measurement distance of the laser diffraction method was 300 mm from the tip of the spraying device, and the Sauter mean diameter of the atomized water under this condition was 10 μm.

図２Ａは、噴霧装置本体部１０ａを含む噴霧装置１０の全体を示す概略図である。図２Ａにおいて、噴霧装置本体部１０ａには、液体流路配管５１の一端と気体流路配管５２の一端とが接続される。液体流路１１は、先端側のみを図示しており、後端の図示しない液体供給口は液体流路配管５１の一端に接続されている。気体流路１２も、先端側のみを図示しており、後端の図示しない気体供給口は、気体流路配管５２の一端に接続されている。 FIG. 2A is a schematic view showing the entire spraying device 10 including the spraying device main body 10a. In FIG. 2A, one end of the liquid flow path pipe 51 and one end of the gas flow path pipe 52 are connected to the spray device main body 10a. Only the front end side of the liquid flow path 11 is shown, and the liquid supply port (not shown) at the rear end is connected to one end of the liquid flow path pipe 51. The gas flow path 12 also shows only the front end side, and the gas supply port (not shown) at the rear end is connected to one end of the gas flow path pipe 52.

液体流路配管５１の他端には、液槽(図示せず)に接続されたポンプ５６が接続されている。ポンプ５６は、一例として、常温で大気圧以上に加圧した液体、より具体的には水、を供給可能としている。
気体流路配管５２の他端には、高圧気体発生器５８が接続されている。高圧気体発生器５８は、一例として、大気圧以上に加圧した気体、より具体的には圧縮空気、を供給可能としている。 A pump 56 connected to a liquid tank (not shown) is connected to the other end of the liquid flow path pipe 51. As an example, the pump 56 can supply a liquid pressurized to atmospheric pressure or higher at room temperature, more specifically water.
A high-pressure gas generator 58 is connected to the other end of the gas flow path pipe 52. As an example, the high-pressure gas generator 58 can supply a gas pressurized to atmospheric pressure or higher, more specifically, compressed air.

液体流路配管５１の途中には、一端から他端の間に順に流量制御器５９と圧力制御器６０とが順に配置されている。
また、気体流路配管５２の途中には、一端から他端の間に順に流量制御器６３と圧力制御器６４とが配置されている。 A flow rate controller 59 and a pressure controller 60 are sequentially arranged between one end and the other end in the middle of the liquid flow path pipe 51.
Further, in the middle of the gas flow path pipe 52, a flow rate controller 63 and a pressure controller 64 are arranged in order between one end and the other end.

さらに、流量制御器５９と圧力制御器６０とポンプ５６と流量制御器６３と圧力制御器６４と高圧気体発生器５８とに接続されて、液体流路配管５１の流量及び圧力と気体流路配管５２の流量及び圧力を同時に制御する制御部６５が設置されている。すなわち、ポンプ５６から液体流路配管５１に供給される液体の流量が流量制御器５９で検出されて制御部６５に入力され、ポンプ５６から液体流路配管５１に供給される液体の圧力が圧力制御器６０で検出されて制御部６５に入力されるとともに、検出された流量及び圧力に基づいて制御部６５によりポンプ５６の駆動が制御される。同様に、高圧気体発生器５８から第１気体流路配管５２に供給される気体の流量が流量制御器６３で検出されて制御部６５に入力され、高圧気体発生器５８から気体流路配管５２に供給される気体の圧力が圧力制御器６４で検出されて制御部６５に入力されるとともに、検出された流量及び圧力に基づいて制御部６５により高圧気体発生器５８の駆動が制御される。実施の形態の噴霧及び洗浄動作は、この制御部６５での制御の基に実施することができる。 Further, the flow controller 59, the pressure controller 60, the pump 56, the flow controller 63, the pressure controller 64, and the high pressure gas generator 58 are connected to each other, and the flow rate and pressure of the liquid flow path pipe 51 and the gas flow path pipe are connected. A control unit 65 that simultaneously controls the flow rate and pressure of the 52 is installed. That is, the flow rate of the liquid supplied from the pump 56 to the liquid flow path pipe 51 is detected by the flow rate controller 59 and input to the control unit 65, and the pressure of the liquid supplied from the pump 56 to the liquid flow path pipe 51 is the pressure. It is detected by the controller 60 and input to the control unit 65, and the drive of the pump 56 is controlled by the control unit 65 based on the detected flow rate and pressure. Similarly, the flow rate of the gas supplied from the high pressure gas generator 58 to the first gas flow path pipe 52 is detected by the flow rate controller 63 and input to the control unit 65, and is input from the high pressure gas generator 58 to the gas flow path pipe 52. The pressure of the gas supplied to is detected by the pressure controller 64 and input to the control unit 65, and the drive of the high pressure gas generator 58 is controlled by the control unit 65 based on the detected flow rate and pressure. The spraying and cleaning operations of the embodiment can be carried out under the control of the control unit 65.

洗浄動作開始時には、まず、大気圧以上に加圧した気体例えば圧縮空気を、高圧気体発生器５８から気体流路配管５２により噴霧装置本体部１０ａに供給するとともに、常温で大気圧以上に加圧した液体例えば水を、ポンプ５６から液体流路配管５１により噴霧装置本体部１０ａに供給する。この結果、噴霧装置本体部１０ａに供給された圧縮空気と水とが気液混合部１５で混合され、噴出口１６ａから噴霧される微粒化した液体である水と気体である空気とにより、被洗浄体に対して噴霧することができて、被洗浄体の表面を洗浄することができる。 At the start of the cleaning operation, first, a gas pressurized to atmospheric pressure or higher, for example, compressed air, is supplied from the high-pressure gas generator 58 to the spray device main body 10a through the gas flow path pipe 52, and is pressurized to atmospheric pressure or higher at room temperature. The liquid, for example, water is supplied from the pump 56 to the spray device main body 10a through the liquid flow path pipe 51. As a result, the compressed air and water supplied to the spraying device main body 10a are mixed by the gas-liquid mixing unit 15, and the atomized liquid water sprayed from the ejection port 16a and the gas air are covered. It can be sprayed onto the body to be cleaned to clean the surface of the body to be cleaned.

詳しくは、内蓋部１３と外蓋部１４との間に設けられた気液混合部１５で、液体流入口１８から流入する液体と気体流入口１９から流入する気体とが向かい合って衝突するとともに、円環状凸部２４に沿って周回及び撹拌して液体が微粒化し、微粒化した液体を噴出口１６ａから噴霧空間に噴出することができる。 Specifically, in the gas-liquid mixing unit 15 provided between the inner lid portion 13 and the outer lid portion 14, the liquid flowing in from the liquid inflow port 18 and the gas flowing in from the gas inflow port 19 face each other and collide with each other. The liquid is atomized by orbiting and stirring along the annular convex portion 24, and the atomized liquid can be ejected from the ejection port 16a into the spray space.

したがって、噴出口１６ａから微細な液体を被洗浄体に対して噴霧しつつ被洗浄体に対する洗浄動作が行える。より具体的には、気化が早くかつ濡れ等を感じないような小さな粒径の例として１０μｍ以下のザウター平均粒径の液体を噴霧しつつ洗浄動作が行える。よって、前記実施の形態によれば、気化が早くかつ濡れ等を感じない粒径の小さな液体による噴霧及び洗浄が可能となる。 Therefore, it is possible to perform a cleaning operation on the object to be cleaned while spraying a fine liquid on the object to be cleaned from the ejection port 16a. More specifically, as an example of a small particle size that vaporizes quickly and does not feel wet, the cleaning operation can be performed while spraying a liquid having a Sauter mean diameter of 10 μm or less. Therefore, according to the above-described embodiment, it is possible to spray and wash with a liquid having a small particle size that vaporizes quickly and does not feel wet.

なお、本実施形態では、液体を加圧するためにポンプ５６を設置する例を示しているが、高圧気体発生器５８によって発生する高圧気体を活用し、液体を加圧することもできる。 In the present embodiment, an example in which the pump 56 is installed to pressurize the liquid is shown, but the high-pressure gas generated by the high-pressure gas generator 58 can be utilized to pressurize the liquid.

次に、本発明の実施の形態１にかかる洗浄方法において、洗浄効果を確かめる実験を行った。その実験結果について、以下に説明する。
本実験例では、洗浄効果を確認するための被洗浄体として、数日間雨ざらしにすることで表面に汚れが付着した鋼板を用いた。噴霧装置本体部１０ａに供給する気体の例として圧縮空気を、液体の例として水をそれぞれ使用し、圧縮空気の圧力を０．２ＭＰａ（ゲージ圧）、水の圧力を０．１５ＭＰａ（ゲージ圧）とし、水の供給量は５０ｍｌ／ｍｉｎとし、洗浄の効果を確認している。本実験条件においては、噴霧装置本体部１０ａから被洗浄体表面までの距離を概略５ｍｍ〜３０ｍｍの範囲で維持することで、被洗浄体表面が洗浄できることが確認できた。 Next, in the cleaning method according to the first embodiment of the present invention, an experiment was conducted to confirm the cleaning effect. The experimental results will be described below.
In this experimental example, a steel plate having stains on its surface after being exposed to the rain for several days was used as the object to be cleaned for confirming the cleaning effect. Compressed air is used as an example of the gas supplied to the spray device main body 10a, and water is used as an example of the liquid. The pressure of the compressed air is 0.2 MPa (gauge pressure), and the pressure of the water is 0.15 MPa (gauge pressure). The amount of water supplied was set to 50 ml / min, and the effect of cleaning was confirmed. Under the experimental conditions, it was confirmed that the surface of the object to be cleaned can be cleaned by maintaining the distance from the spray device main body 10a to the surface of the object to be cleaned within a range of approximately 5 mm to 30 mm.

以上より、供給された気体と液体とを気液混合部１５で混合し、噴出口１６ａから噴霧される微粒化した液体である常温の水と気体である圧縮空気とにより、被洗浄体を洗浄できることがわかった。 From the above, the supplied gas and liquid are mixed by the gas-liquid mixing unit 15, and the object to be cleaned is washed with water at room temperature, which is a atomized liquid sprayed from the ejection port 16a, and compressed air, which is a gas. I found that I could do it.

図２Ｂは、本発明の実施の形態１における洗浄装置７１全体の概略構成図である。
この実施の形態１にかかる洗浄装置７１は、少なくとも１つの噴霧装置１０を有して、被洗浄体７４の表面に近接して配置された状態で噴霧を行って洗浄を行うことを想定している。その理由は、気体及び液体の供給圧力が比較的低いため、噴霧範囲７９が小さいためである。 FIG. 2B is a schematic configuration diagram of the entire cleaning device 71 according to the first embodiment of the present invention.
It is assumed that the cleaning device 71 according to the first embodiment has at least one spraying device 10 and sprays the cleaning device 74 in a state of being arranged close to the surface of the object to be cleaned 74 to perform cleaning. There is. The reason is that the spray range 79 is small because the supply pressure of gas and liquid is relatively low.

そこで、例えば、洗浄装置７１をユーザが手で持って洗浄動作を行うとき、洗浄装置７１を被洗浄体７４の表面に対してどの程度まで近接する必要があるか、ユーザにはわかりにくい場合がある。このため、１つの例として、どの程度まで近接すればよいかを表示装置で表示することが考えられる。 Therefore, for example, when the user holds the cleaning device 71 by hand to perform the cleaning operation, it may be difficult for the user to understand how close the cleaning device 71 needs to the surface of the object to be cleaned 74. is there. Therefore, as an example, it is conceivable to display on a display device how close it should be.

このため、まず、洗浄装置７１には、被洗浄体７４の表面までの距離を測定する、レーザーを用いた測長装置、例えばレーザー距離計のような測長装置７３が設置されている。測長装置７３は制御部６５と接続されている。 Therefore, first, the cleaning device 71 is equipped with a length measuring device using a laser that measures the distance to the surface of the object to be cleaned 74, for example, a length measuring device 73 such as a laser range finder. The length measuring device 73 is connected to the control unit 65.

また、被洗浄体７４の表面と噴霧装置１０との間の距離Ｌが、予め決められた洗浄距離Ｌｗ以内にあるか否かを表示するＬＥＤ又は液晶表示装置などの表示装置７８を備えている。表示装置７８は制御部６５と接続されている。 Further, the display device 78 such as an LED or a liquid crystal display device for displaying whether or not the distance L between the surface of the object to be cleaned 74 and the spray device 10 is within a predetermined cleaning distance Lw is provided. .. The display device 78 is connected to the control unit 65.

よって、測長装置７３で被洗浄体７４の表面と噴霧装置１０との間の距離Ｌを測定し、測定結果を制御部６５に入力する。制御部６５は、測定距離Ｌが洗浄距離Ｌｗ以内にあるとき、表示装置７８に洗浄距離Ｌｗ以内にあることを表示する。例えば、測定距離Ｌが洗浄距離Ｌｗ以内ならば表示装置７８で緑色を点灯し、それ以外の場合には表示装置７８で赤色を点灯するようにしてもよい。又は、測定距離Ｌが洗浄距離Ｌｗ以内にあるか否かを、表示装置７８において文字又は音声で表示してもよい。 Therefore, the length measuring device 73 measures the distance L between the surface of the object to be cleaned 74 and the spraying device 10, and the measurement result is input to the control unit 65. When the measurement distance L is within the cleaning distance Lw, the control unit 65 displays on the display device 78 that the measurement distance L is within the cleaning distance Lw. For example, if the measurement distance L is within the cleaning distance Lw, the display device 78 may light green, and in other cases, the display device 78 may light red. Alternatively, whether or not the measurement distance L is within the cleaning distance Lw may be displayed by characters or voice on the display device 78.

このように構成すれば、ユーザは、被洗浄体７４の表面と噴霧装置１０との間の距離Ｌが、洗浄距離Ｌｗ以内にあるか否か、言い換えれば、有効な洗浄が行える状態か否かを明確に判断することが可能となり、洗浄作業をより効率的に行うことができる。
また、制御部６５により、測定距離Ｌが洗浄距離Ｌｗ以内にある場合にのみ、噴霧装置１０から、微粒化した液体を被洗浄体表面に噴霧可能となるようにポンプ５６と高圧気体発生器５８とを駆動制御するようにして、被洗浄体表面を洗浄することもできる。 With this configuration, the user can use whether or not the distance L between the surface of the object to be cleaned 74 and the spraying device 10 is within the cleaning distance Lw, in other words, whether or not effective cleaning can be performed. Can be clearly determined, and the cleaning work can be performed more efficiently.
Further, the pump 56 and the high-pressure gas generator 58 can be sprayed from the spray device 10 onto the surface of the object to be cleaned only when the measurement distance L is within the cleaning distance Lw by the control unit 65. It is also possible to clean the surface of the object to be cleaned by driving and controlling.

さらに、上記構成において、制御部６５によりポンプ５６を駆動制御して、液体を間欠的に導入可能に構成することもできる。例えば、図２Ａにおいて、制御部６５によりポンプ５６の駆動を停止すれば液体供給を停止することができる。よって、制御部６５に間欠駆動情報としてポンプ５６の駆動時間と駆動停止時間とを予め記憶させておき、記憶させた間欠駆動情報を基に、ポンプ５６の駆動時間では、ポンプ５６を駆動して液体と気体とで噴霧動作を行い、ポンプ５６の駆動停止時間では、ポンプ５６を駆動停止して気体のみの気体噴射動作を行うようにして、液体と気体とが混合された噴霧動作と、気体のみの噴出動作とが交互に実施することができる。 Further, in the above configuration, the pump 56 can be driven and controlled by the control unit 65 so that the liquid can be introduced intermittently. For example, in FIG. 2A, the liquid supply can be stopped by stopping the driving of the pump 56 by the control unit 65. Therefore, the drive time and the drive stop time of the pump 56 are stored in advance in the control unit 65 as the intermittent drive information, and the pump 56 is driven at the drive time of the pump 56 based on the stored intermittent drive information. The spray operation is performed with the liquid and the gas, and during the drive stop time of the pump 56, the pump 56 is driven and stopped to perform the gas injection operation of only the gas, so that the spray operation in which the liquid and the gas are mixed and the gas Only the ejection operation can be performed alternately.

このような構成を使用して水を間欠的に供給した場合の洗浄効果を確認した。水を間欠的に供給することで、水を噴霧装置本体部１０ａに供給しないときは噴霧装置本体部１０ａからは空気のみが噴出されることとなり、噴出した空気で、洗浄時に被洗浄体に残留する水滴を除去するという効果が得られる。本実験においては、一例として、水を２秒間供給し、その後に水を１秒間だけ供給停止するという動作を繰り返すことで、水を間欠的に供給した。水を間欠的に供給することにより、洗浄時の被洗浄体の洗浄の程度を確認しながら洗浄動作を実施できるという効果があることがわかった。 The cleaning effect when water was intermittently supplied using such a configuration was confirmed. By supplying water intermittently, when water is not supplied to the spray device main body 10a, only air is ejected from the spray device main body 10a, and the ejected air remains in the object to be cleaned during cleaning. The effect of removing water droplets is obtained. In this experiment, as an example, water was supplied intermittently by repeating the operation of supplying water for 2 seconds and then stopping the supply of water for only 1 second. It was found that the intermittent supply of water has the effect of being able to carry out the cleaning operation while checking the degree of cleaning of the object to be cleaned at the time of cleaning.

なお、使用可能な範囲として、気体の圧力範囲は０．１〜０．５ＭＰａであり、液体の圧力範囲は０．１〜０．５ＭＰａであり、特許文献１に記載の９ＭＰａなどの高圧よりもかなり低圧である。 As a usable range, the pressure range of gas is 0.1 to 0.5 MPa, and the pressure range of liquid is 0.1 to 0.5 MPa, which is higher than the high pressure such as 9 MPa described in Patent Document 1. It is quite low pressure.

前記実施の形態１にかかる洗浄装置及び洗浄方法によれば、気体及び液体を洗浄に用いて、気液混合部１５で、液体流入口１８から流入する液体と気体流入口１９から流入する気体とが向かい合って衝突するとともに、円環状の凸部２４に沿って周回及び撹拌して液体が微粒化し、微粒化した液体を噴出部１６から噴出することができる。この結果、気化が早くかつ濡れ等を感じない粒径の小さな液体を噴霧できて、洗浄時に周辺への洗浄水の飛散を抑制しつつ洗浄することができる。 According to the cleaning apparatus and cleaning method according to the first embodiment, the gas and the liquid are used for cleaning, and the liquid flowing from the liquid inlet 18 and the gas flowing from the gas inlet 19 are used in the gas-liquid mixing unit 15. Are opposed to each other and collide with each other, and the liquid is atomized by orbiting and stirring along the annular convex portion 24, and the atomized liquid can be ejected from the ejection portion 16. As a result, it is possible to spray a liquid having a small particle size that vaporizes quickly and does not feel wet, and it is possible to perform cleaning while suppressing scattering of cleaning water to the surroundings during cleaning.

また、実施の形態１では、液体と気体の両方を加圧する際の圧力が０．１５ＭＰａ（ゲージ圧）の気体及び０．２ＭＰａ（ゲージ圧）の液体のように比較的低圧であることから、洗浄時に周辺への洗浄水を飛散をより一層抑制しつつ洗浄することができるとともに、動作に必要な機器の大型化を抑制することができる。 Further, in the first embodiment, the pressure when pressurizing both the liquid and the gas is relatively low, such as a gas having a pressure of 0.15 MPa (gauge pressure) and a liquid having a pressure of 0.2 MPa (gauge pressure). At the time of cleaning, it is possible to further suppress the scattering of the washing water to the surroundings while cleaning, and it is also possible to suppress the increase in size of the equipment required for operation.

（実施の形態２）
図３Ａ及び図３Ｂは、本発明の実施の形態２における、噴霧装置１０の噴霧装置本体部１０ａを六個、一列に配置して洗浄装置７１ａを構成するときの断面図及び平面図である。図３Ａあるいは図３Ｂにおいて、六個の噴霧装置本体部１０ａは、細長い矩形の支持プレート７０ａによって一列に間隔をあけて固定保持されて洗浄装置７１ａを構成している。図３Ａおける三角形の点線７９は、各噴霧装置本体部１０ａからの噴霧範囲の概略をイメージしたものであり、隣接する噴霧装置本体部１０ａからそれぞれ噴霧された噴霧範囲は互いに重複する重複範囲７９ａを有するものとして、洗浄効果を高めるようにしている。逆に言えば、洗浄効果を高めるために、噴霧範囲７９を重複範囲７９ａで互いに重複するように、隣接する噴霧装置１０の間隔を狭く配置している。一例としては、洗浄効果をより高めるために、重複範囲７９ａとして少なくとも噴霧範囲の４分の１は、互いに重複するように構成することができる。 (Embodiment 2)
3A and 3B are a cross-sectional view and a plan view of the second embodiment of the present invention when six spraying device main bodies 10a of the spraying device 10 are arranged in a row to form a cleaning device 71a. In FIG. 3A or FIG. 3B, the six spraying device main bodies 10a are fixedly held in a row at intervals by an elongated rectangular support plate 70a to form a cleaning device 71a. The triangular dotted line 79 in FIG. 3A is an image of an outline of the spraying range from each spraying device main body 10a, and the spraying ranges sprayed from the adjacent spraying device main bodies 10a have overlapping ranges 79a that overlap each other. It is designed to enhance the cleaning effect. Conversely, in order to enhance the cleaning effect, the intervals between the adjacent spraying devices 10 are narrowly arranged so that the spraying ranges 79 overlap each other in the overlapping range 79a. As an example, in order to further enhance the cleaning effect, at least a quarter of the spray range can be configured to overlap each other as the overlap range 79a.

また、例えば３個の噴霧装置本体部１０ａが隣接して配置される場合、洗浄効果をより高めるために、隣接する３個の噴霧装置本体部１０ａのうち両端の噴霧装置本体部１０ａの噴霧範囲が互いに重複する範囲を有することもできる。 Further, for example, when three spraying device main bodies 10a are arranged adjacent to each other, in order to further enhance the cleaning effect, the spraying range of the spraying device main bodies 10a at both ends of the three adjacent spraying device main bodies 10a. Can also have ranges that overlap each other.

かかる構成によれば、噴霧装置本体部１０ａで同時に噴霧できる領域を、１個の噴霧装置本体部１０ａの場合よりも大きくすることが可能となり、よって、同時に洗浄できる範囲を拡大することができる。 According to such a configuration, the area that can be sprayed simultaneously by the spraying device main body 10a can be made larger than that of one spraying device main body 10a, and thus the range that can be washed at the same time can be expanded.

なお、本実施の形態２において、噴霧装置本体部１０ａを複数配置する例として、六個配置する例を示したが、洗浄対象となる洗浄物などに応じて、配置する個数を２個以上の任意の数に選択できることは言うまでもない。さらに、本実施の形態２において、噴霧装置本体部１０ａを複数配置する例として、直線状に配置する例を示したが、対象となる洗浄物の形状又は構造などに応じて、図３Ｃ及び図３Ｄに示す変形例にかかる洗浄装置７１ｃ，７１ｄのように、矩形又は正方形の支持プレート７０ｃ，７０ｄに、複数個の噴霧装置本体部１０ａを行列状又は円周状に配置しても問題はなく、また、複数個の噴霧装置本体部１０ａを必ずしも対称的に配置する必要もない。 In the second embodiment, as an example of arranging a plurality of spraying device main bodies 10a, an example of arranging six is shown, but the number of arranging is two or more depending on the cleaning object to be cleaned. It goes without saying that you can select any number. Further, in the second embodiment, as an example of arranging a plurality of spraying device main bodies 10a, an example of arranging them in a linear shape is shown. There is no problem even if a plurality of spraying device main bodies 10a are arranged in a matrix or a circumference on the rectangular or square support plates 70c and 70d as in the cleaning devices 71c and 71d according to the modified example shown in 3D. Further, it is not always necessary to arrange the plurality of spraying device main bodies 10a symmetrically.

（実施の形態３）
図４は、本発明の実施の形態３における洗浄装置７１により、被洗浄体７４を洗浄する場合の構成を示す概略図である。洗浄装置７１は、噴霧装置本体部１０ａ(図示せず)と支持プレート７０ａ(図示せず)から構成されている。例えば、洗浄装置７１は、図３Ａ〜図３Ｄのうちのいずれかで構成されてもよい。本実施の形態３において、洗浄装置７１は、互いに直角なＸＹＺの３方向にそれぞれ独立して移動可能な機構を有する移動装置７２に設置されている。移動装置７２は、例えば、洗浄装置７１をＸ方向に移動可能なＸ方向移動装置７２ｘと、洗浄装置７１をＹ方向に同期して移動可能な一対のＹ方向移動装置７２ｙと、洗浄装置７１をＺ方向に同期して移動可能な一対のＺ方向移動装置７２ｚとで構成することができ、制御部６５で駆動制御される。 (Embodiment 3)
FIG. 4 is a schematic view showing a configuration when the object to be cleaned 74 is cleaned by the cleaning device 71 according to the third embodiment of the present invention. The cleaning device 71 is composed of a spray device main body 10a (not shown) and a support plate 70a (not shown). For example, the cleaning device 71 may be configured by any of FIGS. 3A to 3D. In the third embodiment, the cleaning device 71 is installed in a moving device 72 having a mechanism capable of independently moving in three directions of XYZ perpendicular to each other. The moving device 72 includes, for example, an X-direction moving device 72x capable of moving the cleaning device 71 in the X direction, a pair of Y-direction moving devices 72y capable of synchronizing the cleaning device 71 in the Y direction, and a cleaning device 71. It can be composed of a pair of Z-direction moving devices 72z that can move synchronously in the Z-direction, and is driven and controlled by the control unit 65.

Ｘ方向移動装置７２ｘは、例えば、正逆回転駆動可能なモータ８１ｘと、モータ８１ｘにより正逆回転される螺子軸８２ｘと、螺子軸８２ｘに螺合して進退可能な可動部８３ｘとで構成される。各Ｚ方向移動装置７２ｚは、例えば、正逆回転駆動可能なモータ８１ｚと、モータ８１ｚにより正逆回転される螺子軸８２ｚと、螺子軸８２ｚに螺合して進退可能な可動部８３ｚとで構成される。各Ｙ方向移動装置７２ｙは、例えば、Ｘ方向移動装置７２ｘと同様に、正逆回転駆動可能なモータ８１ｙと、モータ８１ｙにより正逆回転される螺子軸８２ｙと、螺子軸８２ｙに螺合して進退可能な可動部８３ｙとで構成される。 The X-direction moving device 72x is composed of, for example, a motor 81x capable of forward / reverse rotation drive, a screw shaft 82x rotated forward / reverse by the motor 81x, and a movable portion 83x screwed into the screw shaft 82x and capable of advancing / retreating. To. Each Z-direction moving device 72z is composed of, for example, a motor 81z capable of forward / reverse rotation drive, a screw shaft 82z rotated forward / reverse by the motor 81z, and a movable portion 83z screwed into the screw shaft 82z and capable of advancing / retreating. Will be done. Each Y-direction moving device 72y is screwed into, for example, a motor 81y capable of forward / reverse rotation drive, a screw shaft 82y rotated forward / reverse by the motor 81y, and a screw shaft 82y, similarly to the X-direction moving device 72x. It is composed of a movable portion 83y that can move forward and backward.

また、洗浄装置７１には、被洗浄体７４の表面までの距離を測定する、例えばレーザー距離計のような測長装置７３が設置されている。
よって、測長装置７３で被洗浄体７４の表面と噴霧装置１０との間の距離Ｌを測定し、測定結果を制御部６５に入力する。制御部６５は、測定距離Ｌが洗浄距離Ｌｗ以内にあるとき、移動装置７２に対してはＸ方向移動装置７２ｘのみを駆動して噴霧及び洗浄動作を行う。制御部６５は、測定距離Ｌが洗浄距離Ｌｗ以内ではないとき、被洗浄体７４の表面に接近するように各Ｙ方向移動装置７２ｙ及び各Ｚ方向移動装置７２ｚを駆動して、測定距離Ｌが洗浄距離Ｌｗ以内に入るように駆動制御し、測定距離Ｌが洗浄距離Ｌｗ以内に入ると噴霧及び洗浄動作を行う。所定時間駆動しても測定距離Ｌが洗浄距離Ｌｗ以内に入らないときは、異常であるとしてすべての移動装置の駆動を停止する。 Further, the cleaning device 71 is equipped with a length measuring device 73 such as a laser range finder that measures the distance to the surface of the object to be cleaned 74.
Therefore, the length measuring device 73 measures the distance L between the surface of the object to be cleaned 74 and the spraying device 10, and the measurement result is input to the control unit 65. When the measurement distance L is within the cleaning distance Lw, the control unit 65 drives only the X-direction moving device 72x with respect to the moving device 72 to perform spraying and cleaning operations. When the measurement distance L is not within the cleaning distance Lw, the control unit 65 drives each Y-direction moving device 72y and each Z-direction moving device 72z so as to approach the surface of the object to be cleaned 74, and the measuring distance L is set. Drive control is performed so that the measurement distance L is within the cleaning distance Lw, and when the measurement distance L is within the cleaning distance Lw, spraying and cleaning operations are performed. If the measurement distance L does not fall within the cleaning distance Lw even after driving for a predetermined time, the drive of all the moving devices is stopped as an abnormality.

このように構成すれば、被洗浄体７４の表面と噴霧装置１０との間の距離Ｌが洗浄距離Ｌｗ以内にあるように自動的に調整しつつ洗浄が行え、洗浄作業がより一層効率的に行うことができる。 With this configuration, cleaning can be performed while automatically adjusting the distance L between the surface of the object to be cleaned 74 and the spraying device 10 so that it is within the cleaning distance Lw, and the cleaning operation becomes even more efficient. It can be carried out.

また、制御部６５により、測定距離Ｌが洗浄距離Ｌｗ以内にある場合にのみ、噴霧装置１０から、微粒化した液体を被洗浄体表面に噴霧可能となるようにポンプ５６と高圧気体発生器５８とを駆動制御するようにして、被洗浄体表面を洗浄することもできる。 Further, the pump 56 and the high-pressure gas generator 58 can be sprayed from the spray device 10 onto the surface of the object to be cleaned only when the measurement distance L is within the cleaning distance Lw by the control unit 65. It is also possible to clean the surface of the object to be cleaned by driving and controlling.

かかる構成によれば、被洗浄体７４の形状に対し、洗浄装置７１が自動的に移動して最適な位置で洗浄することができる。さらに、被洗浄体７４の形状によらず、洗浄装置７１と被洗浄体７４との距離を一定またはそれに準ずる距離に制御することができ、より安定な洗浄効果を得ることができる。 According to such a configuration, the cleaning device 71 can automatically move with respect to the shape of the object to be cleaned 74 to perform cleaning at an optimum position. Further, regardless of the shape of the body to be cleaned 74, the distance between the cleaning device 71 and the body to be cleaned 74 can be controlled to a constant or similar distance, and a more stable cleaning effect can be obtained.

図５は、応用例として大型の被洗浄体７４、例えば自家用車を自動で洗浄する場合の構成例を示したものである。上下方向沿いに起立した一対の支柱７５に、移動装置７２に設置された洗浄装置７１を両側と上側との合計３つ配置しており、被洗浄体７４に対し、３方向から洗浄可能な構成としている。一対の支柱７５は、例えば、紙面貫通方向のＹ方向に移動可能なＹ方向移動装置７２ｙが組み込まれているとする。なお、図５では、図４の移動装置７２を３組配置しているが、説明を簡略化するため、図４と同一機能を有する装置には同一符号を付している。このため、一対の支柱７５の近くの移動装置７２では、Ｚ方向移動装置７２ｚは図５ではＸ方向に移動させる装置として機能し、Ｘ方向移動装置７２ｘは図５ではＺ方向に移動させる装置として機能する。
かかる構成によれば、自家用車のような大型の被洗浄体７４を自動的に洗浄することが可能となる。 FIG. 5 shows a configuration example in which a large body to be cleaned 74, for example, a private car, is automatically washed as an application example. A total of three cleaning devices 71 installed on the moving device 72 are arranged on a pair of columns 75 that stand up in the vertical direction, and the object to be cleaned 74 can be cleaned from three directions. It is supposed to be. It is assumed that the pair of columns 75 incorporates, for example, a Y-direction moving device 72y that can move in the Y direction in the paper penetrating direction. In FIG. 5, three sets of the moving devices 72 of FIG. 4 are arranged, but in order to simplify the explanation, the devices having the same functions as those of FIG. 4 are designated by the same reference numerals. Therefore, in the moving device 72 near the pair of columns 75, the Z-direction moving device 72z functions as a device for moving in the X direction in FIG. 5, and the X-direction moving device 72x serves as a device for moving in the Z direction in FIG. Function.
According to such a configuration, it is possible to automatically wash a large body to be cleaned 74 such as a private car.

なお、前記様々な実施形態又は応用例のうちの任意の実施形態又は応用例を適宜組み合わせることにより、それぞれの有する効果を奏するようにすることができる。また、実施形態同士の組み合わせ又は実施例同士の組み合わせ又は実施形態と実施例との組み合わせが可能であると共に、異なる実施形態又は実施例の中の特徴同士の組み合わせも可能である。 By appropriately combining any of the various embodiments or applications, the effects of each can be achieved. Further, it is possible to combine embodiments or examples, or to combine embodiments and examples, and it is also possible to combine features in different embodiments or examples.

本発明の前記態様にかかる洗浄方法及び洗浄装置は、気体と液体を洗浄に用いることにより、洗浄時に周辺への洗浄水の飛散を抑制しつつ洗浄可能な洗浄方法及び洗浄装置である。この洗浄方法及び洗浄装置は、車又は外壁の洗浄等に広く用いることができる。 The cleaning method and cleaning device according to the above aspect of the present invention are cleaning methods and cleaning devices that can be cleaned by using gas and liquid for cleaning while suppressing scattering of cleaning water to the surroundings during cleaning. This cleaning method and cleaning device can be widely used for cleaning a car or an outer wall.

１０噴霧装置
１０ａ噴霧装置本体部
１１液体流路
１２気体流路
１３内蓋部
１３ａ内側端面
１４外蓋部
１４ａ外側端面
１５気液混合部
１６噴出部
１６ａ噴出口
１７噴霧装置蓋固定部
１９気体流入口
５１液体流路配管
５２気体流路配管
５６ポンプ
５８高圧気体発生器
５９流量制御器
６０圧力制御器
６３流量制御器
６４圧力制御器
６５制御部
７０ａ，７０ｃ，７０ｄ支持プレート
７１，７１ａ，７１ｃ，７１ｄ洗浄装置
７２移動装置
７２ｘＸ方向移動装置
７２ｙＹ方向移動装置
７２ｚＺ方向移動装置
７４被洗浄体
８１ｘ，８１ｙ，８１ｚモータ
８２ｘ，８２ｙ，８２ｚ螺子軸
８３ｘ，８３ｙ，８３ｚ可動部 10 Spraying device 10a Spraying device main body 11 Liquid flow path 12 Gas flow path 13 Inner lid 13a Inner end surface 14 Outer lid 14a Outer end surface 15 Gas-liquid mixing part 16 Ejection part 16a Ejection port 17 Atomizer lid fixing part 19 Gas flow Inlet 51 Liquid flow path piping 52 Gas flow path piping 56 Pump 58 High pressure gas generator 59 Flow controller 60 Pressure controller 63 Flow controller 64 Pressure controller 65 Control units 70a, 70c, 70d Support plates 71, 71a, 71c, 71d Cleaning device 72 Moving device 72x X direction moving device 72y Y direction moving device 72z Z direction moving device 74 Cleaning object 81x, 81y, 81z Motor 82x, 82y, 82z Screw shaft 83x, 83y, 83z Moving part

Claims

A spraying device main body having a liquid flow path and a gas flow path,
An inner lid portion that is arranged at the tip of the main body of the spray device, covers the opening of the liquid flow path, and has a flat inner end surface.
It is arranged at the tip of the main body of the spray device and has an outer end portion that covers the inner lid portion and has a flat outer end surface that covers the opening of the gas flow path and faces the inner end surface of the inner lid portion. With the outer lid
The gas is arranged between the inner lid portion and the outer lid portion, and is composed of a disk-shaped outer space between the inner end surface of the inner lid portion and the outer end surface of the outer lid portion. A gas-liquid mixing section that mixes the gas flow flowing through the flow path and the liquid flow flowing through the liquid flow path.
A liquid that is provided so as to penetrate at least one position in the circumferential direction of the inner lid portion of the inner lid portion and communicates with the gas-liquid mixing portion to allow a liquid flow flowing through the liquid flow path to flow into the gas-liquid mixing portion. The inlet and
The liquid that is arranged in communication with the gas-liquid mixing portion on the side portion of the gas-liquid mixing portion between the inner lid portion and the outer lid portion and flows into the gas-liquid mixing portion from the liquid inflow port. A gas inlet that allows the gas flow flowing through the gas flow path to flow into the gas-liquid mixing section toward the flow, and
An outlet that is provided so as to penetrate the outer end surface of the outer lid portion and communicates with the gas-liquid mixing portion, and ejects the atomized liquid by mixing the gas flow and the liquid flow at the gas-liquid mixing portion. The surface of the body to be cleaned is cleaned by spraying the atomized liquid on the surface of the body to be cleaned by mixing the gas flow and the liquid flow in the gas-liquid mixing section using a spray device equipped with the above. It is a cleaning method to do
The distance between the spraying device main body of the spraying device and the surface of the object to be cleaned is measured by a length measuring device, and the distance between the surface of the spraying device and the spraying device is a predetermined cleaning distance. The display device indicates whether or not it is within the range,
After the display device indicates that the distance between the surface of the object to be cleaned and the spray device is within the cleaning distance, the atomized liquid from the spray device is applied to the surface of the object to be cleaned. A cleaning method in which the surface of the object to be cleaned is cleaned by spraying.

The cleaning distance is 5 mm to 30 mm.
After the display device indicates that the distance between the surface of the object to be cleaned and the spraying device is within the cleaning distance of 5 mm to 30 mm, the atomized liquid is removed from the spraying device. The cleaning method according to claim 1, wherein the surface of the object to be cleaned is sprayed to clean the surface of the object to be cleaned.

At least two or more of the spraying devices are arranged, and the atomized liquid is simultaneously sprayed on the surface of the object to be cleaned from the spraying device main body of the at least two or more spraying devices to overlap the spraying ranges with each other. The cleaning method according to claim 1 or 2, wherein the surface of the object to be cleaned is cleaned in a state of being allowed to be cleaned.

When the liquid is supplied to the spraying device By intermittently supplying the liquid, the liquid is supplied to the spraying device and the atomized liquid is sprayed from the main body of the spraying device onto the surface of the object to be cleaned. A cleaning operation for cleaning the surface of the object to be cleaned and a gas injection operation for stopping the supply of the liquid to the spray device and injecting only gas from the main body of the spray device onto the surface of the object to be cleaned. The cleaning method according to any one of claims 1 to 3, which is repeated.

And displaying the measurement result of the spray apparatus body a distance between the surface of the cleaning object measured by the measuring device of the spraying device on the display device, range distances the measurement of 5mm~30mm The cleaning method according to any one of claims 1 to 4, wherein the cleaning is performed while maintaining the inside.

A spraying device main body having a liquid flow path and a gas flow path,
An inner lid portion that is arranged at the tip of the main body of the spray device, covers the opening of the liquid flow path, and has a flat inner end surface.
It is arranged at the tip of the main body of the spray device and has an outer end portion that covers the inner lid portion and has a flat outer end surface that covers the opening of the gas flow path and faces the inner end surface of the inner lid portion. With the outer lid
The gas is arranged between the inner lid portion and the outer lid portion, and is composed of a disk-shaped outer space between the inner end surface of the inner lid portion and the outer end surface of the outer lid portion. A gas-liquid mixing section that mixes the gas flow flowing through the flow path and the liquid flow flowing through the liquid flow path.
A liquid that is provided so as to penetrate at least one position in the circumferential direction of the inner lid portion of the inner lid portion and communicates with the gas-liquid mixing portion to allow a liquid flow flowing through the liquid flow path to flow into the gas-liquid mixing portion. The inlet and
The liquid that is arranged in communication with the gas-liquid mixing portion on the side portion of the gas-liquid mixing portion between the inner lid portion and the outer lid portion and flows into the gas-liquid mixing portion from the liquid inflow port. A gas inlet that allows the gas flow flowing through the gas flow path to flow into the gas-liquid mixing section toward the flow, and a gas inlet.
An ejection port that is provided so as to penetrate the outer end surface of the outer lid portion and communicates with the gas-liquid mixing portion, and the gas flow and the liquid flow are mixed at the gas-liquid mixing portion to eject a atomized liquid. At least two or more spraying devices equipped with
The distance between the length measuring device that measures the distance between the main body of the spraying device and the surface of the spraying device of the spraying device and the surface of the spraying device and the spraying device is a predetermined cleaning distance. Further equipped with a display device that displays whether or not it is within the range,
When the display device indicates that the distance between the surface of the object to be cleaned and the spray device is within the cleaning distance, the atomized liquid from the spray device is applied to the surface of the object to be cleaned. A cleaning device that sprays to clean the surface of the object to be cleaned.

The cleaning distance is 5 mm to 30 mm.
When the display device indicates that the distance between the surface of the object to be cleaned and the spray device is within the cleaning distance of 5 mm to 30 mm, the atomized liquid is released from the spray device. The cleaning device according to claim 6, wherein the surface of the object to be cleaned is sprayed to clean the surface of the object to be cleaned.

At least two or more of the spraying devices are arranged, and the atomized liquid is simultaneously sprayed on the surface of the object to be cleaned from the spraying device main body of the at least two or more spraying devices to overlap the spraying ranges with each other. The cleaning device according to claim 6 or 7, wherein the adjacent spray devices are arranged so as to be closely spaced.

When the liquid is supplied to the spraying device By intermittently supplying the liquid, the liquid is supplied to the spraying device and the atomized liquid is sprayed from the main body of the spraying device onto the surface of the object to be cleaned. A cleaning operation for cleaning the surface of the object to be cleaned and a gas injection operation for stopping the supply of the liquid to the spray device and injecting only gas from the main body of the spray device onto the surface of the object to be cleaned. The cleaning device according to any one of claims 6 to 8, further comprising a control unit that controls the spraying device so as to be repeatedly performed.

Displaying the measurement results from the previous SL length measuring device on the display device, the cleaning device according to any one of claims 6-9.

A moving device for the spray device so as to vary the distance between the front Symbol spray device and the cleaning object is moved relative to the cleaning object,
6. The claim 6 includes a control unit that drives and controls the moving device so that the spraying device approaches the object to be cleaned and the distance measured by the length measuring device is maintained in the range of 5 mm to 30 mm. 8. The cleaning device according to any one of 8.